Magnetic ore-separator.



A. G, HOLMBBRG. MAGNETIO 011B SEPABATO'R.

AAIfPIlI-OATIOII FILED NOV. 27, 1908.

972,109, y Patented 1m13.4191o-v 'mann-Lang nucl. uvm. muslim. n c.

ANDERS GUSTAF HOLMBERG, F vLN'GGRUFVAN, SWEDEN.

MAGNETIC oREsErARAToR.-.

Specilcation of Letters Patent.

'Patented ont. 4, i910.

Application filed November 27, 1908. Seri-a1 No.v 464,757.

To all whom it may concern:

Be it known that I, ANDERS GUSTAF l-lfoLiinEiiG, a subject of the'King of Sweden, residing at Langgrufvan, in the Kingdom of Sweden, have invented a new and useful Magnetic Ore-Separator, of which the following is a specification.

This invention refers to a magnetic ore separator, which has a trough, in which the pulv'erized ore suspended in water and gangue is intended to be let in and a belt running in the trough, above which belt are l some groups of electro-magnets for the purpose of attracting the particles of the ore to the belt for separating these from the gangue. and further transporting them toward an outlet and below the linterspaces between of the groups, pits in the trough, which pits are furnished with tubes for the purpose of partly washing away the particles of ore and possibly adhering particles of the gangue from the belt and partly suspending these partiel-esili water, and also below each groupv of magnets a pit formed in the trough and-furnished with a tubein order to wash away the gangue, which ossibly might be on the belt or on the particles of the ore, and each pit below the groups of the magnets has' a bottom sloping toward one side of the trough, at the lower edge of which bottom is an outlet for removing particles of gangue falling down. Such a mag-- netic ore separator is shown on the attached drawing where Figure 1 shows the saine partially in longitudinal vertical section, Fig. 2 in Icross section alono' the line z b in Fig. 1 looking from the left with the tube 14 and the magnet 6 not in section and F 3 in crss section along the line c-cl in Fig. 1 also from the left and with the tube 10 not inssgction.

1 is the trough, into whose inlet/end a sloping trough opens, while its outlet end joins another sloping trough 3.

4 indicates the-belt, which shown in the shape of an endless belt running over the pulleys 5 at the ends of the trough 1. The lower part of the belt forms as shown an interspace with the bottom of the trough, whereby the above mentioned lower part runs either into or above the water.

(3 indicates the electro-magnets, which in the case shown are divided in four successive groups I, II, III and IV. These' magnets are placed a little above the lower part of the belt4 4, which conveniently vruns on flanges 7 attached to the sides of the trough.

In the bottoni of the trough is made a pit- 8 in advance of eachy group of magnets. From the side of the trough 1 a tube 1.0 enters each pit 8 with the nozzle directed downward, which nozzle passes through a perforated plate 16 placed in the pit and ends in the spacev between this plate and the bottom of the pit1 Through this tube 10 the water is forced into the space below the plate. 16, which water passes up in fine jets through the many small holes in the plate 16 and elfe'ctually suspends in water the` particles of ore, which have dropped from the belt 4 and have run with the water down in the pitsS.' The horizontal part of this tube '10 is furnished with openings placed in such a way, that jets `directed obliquely upward hit the belt 4 for the purpose of washing away the particles of ore and the particles of gangue, which possibly might have been brought along with the ore.

12 indicates the pits ybelow the magnet groups. `-In these pits 12 washing tubes 14 enter for the purpose of 'washing away the gangue, that possibly might be Von the belt or on the particles of the ore. The pits 12 have each a bottom l5 (Fig. 2) sloping vtoward one side of the trough, at the lower edge of which bottoni is an outlet 9 for the particles of the gangue dropped in the pits 12 or brought the-re by means of the water,

Y which particles of gangue farther on are brought away in the trough 18. The projections 17!l keep the particles of ore until the magnets have p ulled these latter against the belt 4. y

I The finely pulverized mass of ore and 1gang'ue suspended in water is brought in "through the trough 2 into the .trough 1 and is at the first pit 8 exposed to fine-jets of Awater from the space below the perforated plate 16, which jets still more suspend the mass in water. When the stream' of water carrying the ore is brought fart-her below theiirst4 group of electro-magnetsL the particles of ore are attractedto ythe belt and pressed against it and carried' forward'bv v v the belt. It -is however evident that some gaugue also is caught on the belt and among the particles of ore. The tube 14 is intended Afor washing away this gangue. These par-.L

ticles of gangue so washed away, ltogether with particles of the-same hihi-carried in Lism now -does not act on them, and'partly of the trough/'sinlror fall down.v in the pit 12 vand'a'recarr'i'ed away through the opening `'9 '(Fig.f2) ,down in thedischargetrough 18,

` ,jbuta part .of the particles of, gangue'is en' tangled arnongthe particles of attracted ore,

wherefore a furtherseparating is'l necessary. Between the groups of'electro-magnets'I and VII, therefore anotherfsuspending in water attained in the -pit 8 partly of .particles dropped from thebelt, becausethemagnet-f particlesjwashed' away from the beltby the tube"10"1a-'afterwhich lanother attracting of the particles. of' 4ore is--done below the groupI ofelectro-inagn'etsII.. In the same way also the" third. and fourth groups-of electro-mag- .'net's work, so that the ore at the shown separator y1s 'separatedfour consecutive timesi After passing 'the last group IV, the last from the belt down inthe discharge trough 3.

tube -19 washes away the particles ofvore I claim l.v Infa magnetici ore separator, 'an'A elon i l'gated trough, an endless belttherein spaced therefrom, a plurality of sets :of magnets above' the lower run f of 'the belt, the trough 'being formed with a pit in advance of" each [group of magnets,- a foramlnated plate vin each such pit, a water delivery tube for each such vpit having a nozzle projected downwardlytlgi'ou'g'h the foraminated plate and lterrninaag in fthe space below said plate,

' l the'trough being also-formed with a pit under each group of magnets, each such pit having. a transversely sloping bottoml and being .provided with'a discharge at theend of the bottom, and means for feeding mate' rial Ito the trough; l

In a. magnetic ore separator, an e1ongated "trough, an endless belt therein spaced therefrom, a' plurality of sets of magnets above the lower run of the belt, thetrough being formed with a pit in advance of each group of magnets, a foraminated each such pit, a water delivery tube or each such pit having a nozzle projected downwardly 'th-rough the foraminated plate and terminating in the spacebelow said plate, said tube having on its top surface a pluralder the groups of magnets, said tube havingl va' pluralityof outlets directed toward the belt, and means for feeding material to the trough.

` In testimony that I claim the foreg0ing.,f ,`s` my' invention, I have signed myname ln presence of two subscribingwitnesses.

ANDERS GUSTAF HOLMBERG. Witnesses:

CARL O. SAHLBERG, 'HJALMAR Zn'r'rERsTrM.

latein i 

